Clutch



July 11, 1939. WALES 2,165,670

CLUTCH Filed March 2'7, 195'! 3 Sheets-Sheet 1 .71? @72207"! furl 9%. lcales Jul 11, 1939. E A. WALES CLUTC H Filed, March 27, 1937 3Sheets-Sheet 2 July 11, 1939. WALES 2,165,670

CLUT H Filed March 27, 1957 3 Sheets-$heet 3 Patented July 11, 1939UNITED STATES PATENT OFFICE CLUTCH Application March 27,

9 Claims.

This invention relates to improvements in clutches, particularlyclutches employed in automotive vehicles or the like, and refersspecifically to a clutch construction wherein means is pro- 5 videdwhich facilitates theready release of the friction element or drivenmember from the driving member.

In the usual automotive clutch, a driving member, usually the fly-wheelof the engine, a friction facing carried by the clutch disc, (the drivenmember), and a pressure plate for confining the friction facing incontact with the flywheel, are provided. The clutch disc is disposedbetween the fly-wheel and the pressure plate, and is usually carried bya hub or collar which is splined to the clutch shaft. In themanipulation of the clutch, the splined collar, carrying the clutchdisc, is moved lengthwise along the clutch shaft when the pressure platemoves the facing into contact with the fly-wheel. To release the clutch,the pressure plate is relieved of the spring pressure which urges itinto contact with the facing, and in theory, the friction facing beingrelieved of the pressure, disengages from 5 the fly-wheel, thedisengagingmovement being accomplished by the sliding of the splined hubupon the splined clutch shaft.

However, when high torque is being delivered, release of the pressureupon the .pressure plate ",1 does not always result in. thedisengagement of the facing and'fly-wheel. This is due primarily to thehigh normal pressure which exists between the sides of the splined teethof the collar bearing upon the sides of the shaft splines. Underconditions of high torque delivery, this normal pressure is sometimes sogreat that disengagement of the facing from the fly-wheel, permitted bymovement of the hub, will not take place until the delivered load isreduced regardless of the fact that the pressure plate may havepreviously been disengaged. Such a condition is, of course, notdesirable and at times is positively dangerous since it, in effect,takes control of the vehicle out of the drivers hands.

One of the features of my invention resides in the provision of meansfor securing the release of the friction facing from the fly-wheelwithout relying on slidable movement of. the splined hub of the frictiondisc upon the splined clutch shaft. This feature, therefore, insures.full control of the motion of the vehicle irrespective of the torquebeing delivered at the time of exercising control.

' Briefly described, my invention comprises a clutch disc, the portionof which that carries the 1937, Serial N0. 133,331

friction facing being movable independently of the hubportion in adirection at right angles to the face of the fly-wheel. The disc isprovided with means for connecting the outer portion thereof to theinner or hub portion whereby the torque may be transmitted from theouter portion to the hub and, hence, the clutch shaft.

The objects and advantages of my invention will be apparent from theaccompanying drawings and following detailed description.

In the drawings, Fig. 1 is a sectional view of a clutch embodying theconcept of my invention.

Fig. 2 is a detailed sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a sectional view taken on line 33 of Fig. 1.

Fig. 4 is a fragmentary face view of a modified form of coupling orconnecting device.

Fig. 5 is a sectional view taken on line 5-5 of Fig. 4:.

Fig. 6 is a partial face view of another modification of my invention.

Fig. 7 is a fragmentary sectional view of a further modification of myinvention.

Fig. 8 is a sectional view taken on line 8-8 of Fig. 7.

Fig. 9 is a sectional view taken on line 9-9 of Fig. '7.

Fig. 10 is an enlarged view illustrating the connecting links betweenthe inner and outer disc sections.

Referring in detail to the drawings, l indicates the rear end of anengine shaft having an outwardly extending annular flange 2. A flywheel3 is carried upon the shaft I, said fly-wheel having the usual annularweb 4 which is secured by means of bolts or the like 5 to the flange 2.The periphery of the fly-wheelv 3 may be flanged as indicated at 6, theouter surface of which is provided with gear teeth 1 which are adaptedto mesh with a pinion carried by the shaft of the starting motor (notshown).

The end of the shaft I is provided with an axial bore 8 which serves asabearing for the restricted end 9 of clutch shaft Ill. The end, proper,of the clutch shaft I0 is provided with splines II which are adapted tointermesh with splines l2 formed on the inner surface of hub I3.

A radially extending flange I4 is formed integral with hub 53 andcarries an annular disc l5, said disc being secured to the flange M bymeans of rivets 16 or other suitable fastening means. The outerperiphery of the disc I5 is flanged as indicated at ll in Figs. 1 and .3and bolts l8 are mounted in circumferentially spaced fly-wheel.

relationship upon the flange H. A link I9 is pivotally carried adjacentits end upon each of the bolts I8. The opposite ends of the links |9 arepivotally connected to bolts 26 which are carried by an annular flange2| comprising the inner portion of the remainder of the clutch discindicated at 22 in Figs. 1 and 3. Friction facings 24 are carriedadjacent each surface of the disc 22 and are secured to said disc bymeans of countersunk rivets 25. A pressure plate 26, comprising anannular ring, is adapted to be disposed adjacent the outer frictionfacing 24, said pressure plate being positioned in a plane substantiallyparallel to the face of the friction element. Recesses 21 are providedat circumferentially spaced intervals in the pressure plate 26, eachrecess 21 comprising a bore 28 of relatively enlarged diameter and abore 29 of relatively restricted diameter. Elongated bolts 30 arepositioned in the recesses 21 and extend outwardly therefrom, said boltsbeing provided with heads 3| which are retained within the portion ofthe recesses 21 of enlarged cross section.

A collar 32 embraces shaft II! and is spaced therefrom, said collarterminating at one end in an outwardly extending annular flange 33 whichcarries ring 34. A sleeve 35 is slidably but non-rotatably positionedupon collar 32, said sleeve being slidably secured to said collar bymeans of key 36 which is adapted to move through a slot provided in thesleeve 35. A disc or head 31 is carried by the sleeve 35 and is providedwith a plurality of apertures 38 through which bolts 36 extend. Aplurality of lugs 39 are mounted upon the outer face of the head 31 andcarry bolts or pins 40 which serve as fulcrums for levers 4|. The toe 42of each lever 4| is adapted to contact nut 43 threadedly secured to theend of bolt 30, the toe 42 being of bifurcated construction. Theopposite ends of levers 4| extend radially toward shaft H) and bear uponthe flange 33 of collar 32. A compression coil spring 44, hereinafterreferred to as the clutch spring, circumscribes each bolt 30 and isconfined between the head 31 and the pressure plate 26.

A plurality of lugs 45 are secured to the web of the fly-wheel 5, saidlugs carrying bolts or pins 46 to which links 41 are pivotally secured.The opposite ends of links 41 are pivotally mounted upon bolts 48 whichare threaded into bosses 49 formed upon the pressure plate 26. The lugs45 are spaced circumferentially around fly-wheel 3 and a boss 49 isprovided on the pressure plate 26 adjacent each lug.

In operation, fly-wheel 3 is driven by the vehicle engine. One end ofclutch shaft I extends into the transmission of the vehicle and theopposite end thereof is journalled in the bore 8 of the When operativeconnection is desired between the engine and the transmission of thevehicle, springs 44 acting betweenhead 31 and pressure plate 26 move thepressure plate into contact with the outer clutch facing 24 and urge theinner clutch facing into contact with the web 4 of the fiy-wheel. Whenthe apparatus is in this position the load is delivered from theflywheel to the clutch disc and is transmitted through links l9 to theinner portion of the clutch disc, through hub l3 to shaft Ill. When itis desired to disengage the clutch, the clutch pedal (not shown) ispushed downwardly by the driver and means connected to said clutch pedalis provided for contacting ring 34 whereby collar 32 is moved inwardly.When collar 32 moves inwardly the inner ends of levers 4| are also movedinwardly and as a consequence, the outer ends 42 thereof move outwardlypulling pressure plate 26 away from the fly-wheel against thecompression of springs 44. When the normal pressure is relieved from thefriction facings 24, said facings are permitted to move away from thefly-wheel by the provision of the pivoted links l9, and hence, completedisengagement of the clutch shaft is secured. Hub 3 may be immovablymounted upon the end of shaft Ill or, if desired, the hub may beslidable on said shaft. However, by the provision of the links l9 it isimmaterial whether hub l3 moves or not since the outer portion of theclutch disc will move independently of the inner portion thereof. Inthis manner binding of the splines H with splines l2 has no bearing uponthe disengagement of the friction material from the fly-wheel since saiddisengagement is only dependent upon movement of the links l9.

In view of the fact that when the outer portion 22 of the clutch discmoves relative to the inner portion of said disc, there is a slightdegree of rotation of said portions with respect to each other, theapertures in links l9 through which bolts l8 pass are slightly largerthan the diameter of said bolts and the inner faces 50 of the bolt headsand the faces of washers 5| between which the links are confined arerounded to permit a slight degree of lateral motion of the links.

As can readily be seen, head 31 moves in unison with fiy-wheel 3 as doesalso pressure plate 26. This movement is brought about by the connectinglinks 41 which permit motion of the pressure plate 26 in a directionparallel to the axis of the shaft l0 but render the pressure plateimmovable with respect to the fly-wheel in regard to rotary motion.Heretofore the connection between the fly-wheel and pressure plate ofthe usual clutch mechanism was accomplished through the medium of keyingthe pressure plate to slots or key ways provided in lugs or a casingcarried by the fly-wheel. These keys, frequently become bound in the keyways and, hence, prevented movement of the pressure plate to release thefriction facings from contact with the fly-wheel rendering clutch pedaloperation diflicult.

In the present invention by the provision of linkages 41 binding issubstantially eliminated, which is conducive to more satisfactory clutchoperation. In view of the fact that movement of the pressure plate 26along a line parallel to the axis of shaft |0 produces a slight degreeof rotation of the pressure plate, the same provision is made withrespect to links 41 as has been hereinbefore described with regard tolinks I9, that is, a slight degree of lateral movement is provided atthe connection of the links with the bolts 48.

Referring particularly to Figs. 4 and 5 in which a slight modificationof my invention is shown. The reference numeral 52 indicates the innerportion of a clutch disc similar to the member l5,

said inner portion being secured to a suitable hub (not shown) which, inturn, is mounted upon the clutch shaft. The inner portion of the disc isprovided with an annular flange 53. A plurality of blocks 54 are securedin o'ircumferentially spaced relationship upon the flange 53, saidblocks being riveted to said flange or attached in any other suitablemanner. A leaf or blade spring 55 is secured at one end to each of saidblocks, the means of securement comprising rivets 56 or the like. Theopposite ends of'each of said springs are secured to blocks 51 which, inturn, are mounted upon annular flange 58 comprising a portion of thedisc 59. Similar to the construction illustrated in Figs. 1, 2 and 3,any desired number of springs 55 maybe used whereas in the constructionillustrated in Figs. 1, 2 and 3 any desired number of links H! or 41 maybe employed. A clutch facing 68 is secured to each face of the disc 59,the clutch disc as a whole comprising the inner portion 52 and the outerportion 59, and is adapted to be employed with a clutch mechanismsimilar to that hereinbefore described.

A similar spring coupling or connection (not shown) may be utilized toassociate the fiy-wheel with the pressure plate, that is, leaf or bladesprings mounted in a manner similar to the mounting of springs 55 maysupplant the links 41.

The arrangement is such that when the clutch is in engaged position thepressure plate bearing against the friction facing 60 confines saidfacing in contact with the fly-wheel. When it is desired to disengagethe clutch the spring pressure acting upon the pressure plate isrelieved and the outer disc 59 acting under the influence of springs 55moves the friction facings 60 away from the fly-wheel. The sameoperation, of course, takes place with respect to the pressure plate,that is, said pressure plate moves away from the friction facings whenthe influence of the clutch springs is removed, the movement of thepressure plate taking place through the agency or urging force of thesprings connecting the pressure plate to the fly-wheel.

Referring particularly to Fig. 6 another modified form of my inventionis shown wherein 6| indicates a conventional fly-wheel. Secured to saidfly-wheel and extending rearwardlytherefrom is a clutch housing similarto that shown in Fig. '7, to be hereinafter more fully described. Thereference numeral 62 indicates a portion of said housing, namely, thatportion which extends at right angles to the web of the fly-wheel.

The inner surface of the housing 62 is provided with lugs 63 which arespaced circumferentially from each other at desired points, said lugsbeing in the form of splines which are disposed substantially at rightangles to the fly-wheel web. A ring 64 is adapted to bepositioned withinthe housing 62, said ring being provided with slots 85 which registerwith the lugs or splines 63. As can readily be seen the housing 62 movesin unison with the fly-wheel when the fly-wheel is rotating, andsimilarly the ring 64 moves in unison with the housing by virtue of theengagement of the splines or lugs 63 in the slots 65. Radiallyprojecting lugs 66 are formed upon the inner periphery of the ring 64 atcircumferentially spaced intervals. A leaf or blade spring 61 is securedto each of the lugs 66 by means of rivets or the like 68. The oppositeend of each of said springs 61 is secured to radially projecting lugs 69carried by the outer portion of a pressure plate 19. Disposed betweenthe pressure plate 18 and the web of the fiy-wheel 6| is an outer clutchdisc H which carries friction facings (not shown).

The inner periphery of the disc ll carries inwardly extending radiallugs 'II' which are positioned in circumferentially spaced relationship.

A leaf or blade spring 12 is mounted as shown at 13 in Fig. 6 upon eachof said lugs H. The opposite end of each of said springs is secured to alug 14 formed upon the outer surface of the inner disc 15. The innerdisc 15 is in turn secured by means of rivets or the like 16 to hub I1which is provided with splines I8 engageable with splines 19 formed on aclutch shaft 88. In this form of my invention means is providedcomprising ring 64 for readily positioning my improved pressure platewithin the clutch housing. The operation of this clutch is similar tothat herein.- before described and the hub 11 may or may not beimmovably mounted upon the clutch shaft 80. When disengagement of theclutch takes place, pressure plate 10, relieved of the influence of theclutch springs moves outwardly away from the fly-wheel. This movement isaccomplished through the agency of the blade springs 61. When thefriction facings are thus relieved of the pressure of the pressureplate, the outer disc H moves outwardly away from the web of thefiy-wheel under the influence of springs 12. In

this manner disengagement is not dependentupon movement of the hub 11upon shaft 80 and, consequently, the possibility of binding when thedevice is delivering high torque is eliminated.

Referring particularly to Figs. '7, 8 and 9, a further modification ofmy invention is shown. The reference numeral 8| indicates a portion of aclutch mechanism comprising the rear end of engine shaft 82 andfly-wheel 83 mounted thereon. A clutch shaft 84 is journalled at one endin a recess 85 provided in the end of the engine shaft 82. A clutchhousing 86 is secured to the fly wheel 83 by means of bolts or the like81. Collar 88 embraces a portion of the clutch shaft 84 and is slidablyassociated with sleeve 89 comprising a portion of the housing 86. Thecollar 88 is-identical with collar 32 illustrated in Fig. 1 and thehousing 86 corresponds functionally t the head plate 31 shown in Fig. 1,and housing 62, a portion of which is illustrated in Fig. 6. A hub 98having internal splines is mounted upon the splined portion 9| of clutchshaft 84, said hub having a plurality of radially protecting bosses 92.

A self-aligning ball bearing assembly 93 is positioned in a suitablebore provided in each of the bosses 92, the inner race of each of saidball bearing assemblies being secured to a member 94. The member 94 ineach of the assemblies is cylindrical and rotates freely within thebosses and a threaded bolt or screw 95 is eccentrically carried by eachof the members 94 and projects outwardly therefrom. The outer end ofeach of said bolts 95 is provided with a head 96. Bolts 95 are adaptedto be positioned through a flange 9'! formed at the inner periphery of aclutch disc 98 and spacers 99 embrace the shank of the bolts 95 wherebythe flange 91 is confined between the heads 96 of the bolts and thespacers. By the provision of the self-aligning bearing assemblies93 theslightly arcuate movements of the members 94, with respect to the axisof shaft 84, is permitted. Adjacent the outer periphery of the clutchdisc 98'annular friction facings I00 are mounted by means ofconventional rivets IUI.

That portion of clutch housing 86 which projects at right angles to theweb of the fly-wheel 83 is provided with a plurality of apertures I02,in each of which a self-aligning ball bearing assembly I83 ispositioned. A small cover plate I84 is adapted to form a closure for theouter portion of the apertures I02 and prevent grit and dirt fromentering the ball bearing. A cylindrical element I is associated withthe inner race of each of the ball bearing assemblies I03, each of saidcylindrical elements being provided with inwardly projecting pins I06,the ends III! of which are of restricted diameter and are loosely theplanes of the outer races.

disposed in apertures formed in the outer peripheral surface 'of thepressure plate I08. The

pins I06 are eccentrically positioned with respect to the cylindricalelements I05. A plurality of I coil springs I09 are confined betweenpressure plate I08 and the inner face of easing or housing 86, saidsprings corresponding to the springs 44 illustrated in Fig. 1.

In this form of my invention the hub may or may not, as desired, berigidly mounted upon the end of the clutch shaft 84. When the clutch isin engaged position the pressure plate I08 bears against the frictionfacings I00 and confines said facings in contact with the web of thefly-wheel 83, pressure plate I08 being urged in this position by springsI09. Movement of the clutch disc 98 toward the fly-wheel is permitted bythe eccentric relationship of the bolts and the elements 94 which lattermove with the inner race of the ball bearing assembly 93. When theclutch is released, that is, when springs I09 cease to bear upon thepressure plate I08, clutch disc 98 no longer has any urging forcetending to keep it in contact with the fly-wheel 83 and, hence, theinner races of the ball bearing assemblies permit free movement of theelements 94 and, hence, pins or bolts 95. In this manner the normalpressure of the clutch facing is relieved. Motion of the fly-wheel 83 istransmitted directly to the housing 86 since said housing is rigidlymounted thereon and, inasmuch as housing 86 is secured to pressure plateI08 by means of pins I05, said pressure plates rotate in unison with thefly-wheel. In view of the fact that the pressure plate I98 must also bemovable at right angles to its plane of rotation, this motion isaccommodated by rotation of the members I05 within the ball bearingassemblies I 09 and the eccentric movement of pins I06. It can readilybe seen that in this manner no binding of the pressure plate with thehousing is permitted as has heretofore been the case wherein thepressure plate has been splined or keyed to the housing. In this form ofmy invention both the pressure plate and the clutch disc move into andout of engagement with a minimum of friction and, hence, the possibilityof failure of the clutch to disengage is extremely remote.

It will be noted that when the clutch disc 98 imoves relative to the hub90, or the pressure plate I08 moves relative to the housing 86, severalmovements must be taken into consideration. There is the translatorymovement parallel to the axis of shaft 84, and circumferential movementabout the axis of shaft 84. The

accompanied by rotary movement of the clutch disc with respect to thehub and the pressure plate with respect to the housing 86. Thesemovements, of course, are rotary or circumferential whereas the planesof the bearings are tangential to arcs described about the axis ofrotation, that is, the axis of shaft 84. However, all of the ballbearing assemblies are self-aligning, that'is, the planes of the innerraces can be changed, within a small degree, with respect to Thispermits the eccentric pins to describe small arcs instead of movingprecisely in a tangential plane. If bearings other than theself-aligning type are used these movements can be compensated for byperfmitting pins 95 and pins IN to rock in flange 91 and pressure plateI08 respectively by making said connections sufiiciently loose. However,selfaligning bearings are preferable since full advantage of thefrictionless characteristics of the bearings may be obtained.

I claim as my invention:

1. In combination with a clutch mechanism which comprises a drivingmember, a pressure plate, a driven shaft and means for moving thepressure plate into and out of operative position, of a clutch disccomprising an inner and an outer section, a friction facing on saidouter section positioned between the driving member and the pressureplate, the inner section being carried by said driven shaft, andswingable means connecting said inner and outer sectionstogether wherebysaid outer section is freely movable independently of said inner sectionin a direction parallel to said driven shaft.

2. In combination with a clutch mechanism having a fiy-wheel, a pressureplate, a driven shaft and means for moving said pressure plate parallelto said driven shaft, of a clutch disc comprising an inner and an outersection, a friction facing carried on said outer section positionedbetween the fly-wheel and the pressure plate, the inner member beingcarried by said driven shaft, and swingable means connected to saidinner and outer sections whereby said outer section is freely movableindependently of said inner section a predetermined distance in adirection parallel to said driven shaft.

3. In combination with a clutch mechanism having a fly-wheel, a pressureplate, a driven shaft and means for moving said pressure plate parallelto said driven shaft, of a clutch disc comprising an inner and an outersection, a fric tion facing carried on said outer section positionedbetween the fiy-wheel and the pressure plate, the inner member beingcarried by said driven shaft, and means for connecting said inner and.outer sections together whereby said outer disc section and connectedto the outer' periphery of the inner section.

4. In combination with a clutch mechanism having a fly-wheel, a pressureplate, a driven shaft and means for moving said pressure plate parallelto said driven shaft, of a clutch disc comprising an inner and an outersection, a friction facing carried onsaid outer section positionedbetween the fly-wheel and the pressure plate, the inner section beingcarried by said driven shaft, and means for connecting said inner andouter sections together whereby said outer section is movableindependently of said inner section a predetermined distance in adirection parallel to said driven shaft, said means comprising aplurality of flexible members secured to the inner periphery of theouter disc section and connected to the outer periphery of the innersection, and tending to normally hold said inner and outer sections inoffset relationship;

5. In combination with a clutch mechanism having a fiy-wheel, a pressureplate, a driven shaft and means for moving said pressure plate parallelto said driven shaft, of a clutch disc comprising an inner and an outersection, a friction facing carried on said outer section positionedbetween the fly-wheel and the pressure plate, the inner section beingcarried by said driven shaft, and means for connecting said inner andouter sections together whereby said outer section is movableindependently of said inner section a predetermined distance in adirection parallel to said driven shaft, said means comprising aplurality of links pivotally secured to the inner periphery of the outerdisc section and connected to the outer periphery .of the inner section.

6. In combination with a clutch mechanism having a fly-wheel, a pressureplate, a driven shaft and means for moving said pressure plate parallelto said driven shaft, of a clutch disc comprising an inner and an outersection, a friction facing carried on said outer section positionedbetween the fly-wheel and the pressure plate, the inner section beingcarried by said driven shaft, and means for connecting said inner andouter sections together whereby said outer section is movableindependently of said inner section a predetermined distance in adirection parallel to said driven shaft, said means comprising aplurality of ball bearing assemblies carried. by the inner section,eccentrically disposed pins carried by said bearings, said pins beingconnected to the inner periphery of said outer disc section.

'7. In combination with a clutch mechanism having a fiy-wheel and acoaxially disposed clutch shaft, of a clutch disc comprising an innerand an outer section, a friction facing carried on said outer section, apressure plate connected to said fiy-wheel for rotation in unisontherewith, said connection comprising a plurality of links pivotallyconnected to said pressure plate and fly-wheel whereby limited lateralmovement of said pressure plate with respect to said fly-wheel ispermitted, the outer section of said clutch disc being disposed betweensaid pressure plate and the flywheel, the innersection of said clutchdisc bein connected to said clutch shaft, and a plurality of linkspivotally connecting said inner and outer sections together whereby saidouter section is movable independently of said inner section apredetermined distance in a direction parallel to said clutch shaft. 7

8. In combination with a clutch mechanism having a fiy-wheel and acoxially disposed clutch shaft, of a clutch disc comprising an inner andan outer section, a friction facing carried on said outer section, apressure plate connected to said fly-Wheel for rotation in unisontherewith, said connection. comprising a plurality of eccentric bearingmembers which permit limited lateral movement of said pressure platewith respect to said fly-wheel, the outer section of said clutch discbeing disposed between said pressure plate and the fly-wheel, the innersection of said clutch disc being connected to said clutch shaft, andeocentric bearing means for connecting said inner and outer sectionstogether whereby said outer section is movable independently of saidinner section a predetermined distance in a direction parallel to saidclutch shaft.

9. In combination with a clutch mechanism having a fly-wheel and acoaxially disposed clutch shaft, of a clutch disc comprising an innerand an outer section, a friction facing carried on said outer" section,a pressure plate connected to said fly-wheel for rotation in unisontherewith, said connection comprising a plurality of ball bearingsassociated with said fly-wheel, pins eocentrically carried by the innerraces of said ball bearings, saidpressure plate being provided withapertures for the reception of said pins whereby limited lateralmovement of said pressure plate with respect to said fly-Wheel ispermitted, the outer section of said clutch disc being disposed betweensaid pressure plate and the fly-wheel, the inner section of said clutchdisc being connected to said clutch shaft, and means for connecting saidinner and outer sections together whereby said outer section is movableindependently of said inner section a predetermined distance in adirection parallel to said clutch shaft.

EM-tL A. WALES.

